Angkor Wat was built at the beginning of the 12th century (1113) during the Khmer Empire.
It took about 35 years to build.
The temple was dedicated to the worship of the Hindu god Vishnu.
Temple characteristics:

It is the largest religious temple in the world in terms of area, with an area of 162.6 hectares (402 acres).
It is distinguished by its unique design that combines Hindu and Buddhist elements.
It is known for its five distinctive towers representing Mount Meru, the holy mountain in Hinduism.
The temple is decorated with numerous sculptures and reliefs depicting scenes from Hindu mythology and daily life in the Khmer Empire.